Partial hydrolysis of a mixture of Me2SnCl2 and Me3SnCl affords an aggregate of the composition [Sn2Cl(O)(OSnMe3)(Me)(4)](2) which cocrystallises with two equivalents of Me3SnCl to form endless bands of ([Sn2Cl(O)(OSnMe3)(Me)(4)](2). 2Me(3)SnCl)(infinity) linked through Sn . . . Cl intermolecular contacts.